Annunciator



Patented Oct. 25, I898. U. WIEDERHULD.

ANNUNGIATOR.

(Appl'icationflled on 2, 1597.

(lo Ilodal.)

E W M N w M M m 8% UNITED STATES PATENT OFFICE.

OSCAR WIEDERIIOLD, OF SUMMIT, NEW JERSEY.

ANNUNCIATO R.

SPECIFICATION forming part of Letters I atent No. 612,885, dated October 1898- Application filed October 2, 1897. Serial No. 653,813. (No model.)

To all whom it may concern:

Be it known that I, OSCAR WIEDERHOLD, a resident of Summit, Union county, State of New Jersey, have invented certain new and useful Improvements in Annunciators, of which the following is a specification.

My invention relates to annunciators, and has for its object to improve the construction thereof.

The invention has reference more especially to that class of annunciators wherein a drop is supported by a pair of oppositely-impelled armature-levers which are drawn together by a magnet to release the drop.

My invention will be understood by referring to the accompanying drawings, in which- Figure 1 is a front'elevation of an annunciator embodying my invention, the front plate of the box and the target of the annunciator being omitted for greater clearness. Fig. 2 is a section on line 2 2 of Fig. 1, showing the front glass plate of the annunciator in section and the targets in side elevation. Fig. 3 is an isometric view of the annunciatormagnet and armature-levers. Fig. 4 is a perspective view of the diamagnetic cap of the annunciator-magnet and the limiting-stops for the armature-levers, and Fig. 5 is an isometric view of one of the armature-levers detached.

In the drawings, a is a casing having a front glass plate b, an annunciator-drop-restoring device 0, and suitable binding-posts d. One or more frames 6 are mounted upon the casing a, being secured thereto by screws f passing through perforated lugs g. The frame or frames e each carry a magnet h, having a core i, which extends entirely through the magnet and is capped at its exposed end by diamagnetic cap j, provided with arms 70, turned up at their ends to form limiting-stops Z for the swinging armaturelevers. Armature-levers n are carried upon pivots 0, entering the front end or cross-bar m of the frame 6, and are free to swing upon said pivots. These armature-levers may be of the form shown and pivoted intermediate of their ends and provided at their upper ends with apertures 19 to be engaged by a spring g, which serves to draw the upper ends of the armatures together, and consequently to spread theirlower ends. These armatures are preferably stamped out of sheet metal in the form shown and are recessed at r, the said recesses being bounded by a wall .9, which is curved to conform to the general shape of the pole of the magnet carrying the diamagnetic cap and embraces the said diamagnetic cap,as will clearly appear from the drawings. The lower ends of these armatures terminate in hooks n, which engage in apertures in an annunciator-drop i. The apertures in which the hooks engage are not shown in the drawings, but may be of any suitable character, either a single aperture for receiving both of the hooks or two apertures, one for receiving each hook. The number is immaterial.

The operation of the device will be readily understood without further explanation. It is to be noted, however, that the pull of the spiral springs g should preferably be in a direct line between the two armatures, as this conduces to certainty of operation and avoids danger of the apparatus getting out of order,

as springs thus disposed will act properly at all times. It will likewise be noticed that the wall 3 rises from the armature-body at substantially a right angle and is a thin wall, so as to conduce to lightness and to enable the armatures to be made of sheet metal,which is very desirable in this class of constructions.

What I claim, and desire to secure by Letters Patent, is

1. An annunciator comprising in its construction a plurality of swinging armatures adapted to be acted upon by a magnet-pole, a diamagnetic cap adapted to cover the said magnet-pole and to prevent the armature from contacting therewith and provided with a plurality of stops for limiting the movement of the armatures in areverse direction.

2. An armature formed up from sheet metal and provided with a recess in its side conforming in shape to the magnet-pole with which the said armature is to be used and a thin wall bounding the said recesses and extending at an angle to the face of 2 the armature and adapted to be acted on by the magnet.

OSCAR WIEDERI'IOLD.

Witnesses GEO. E. MORSE, MAURICE BLOCK. 

